cfd511 Posted March 3, 2020 Share Posted March 3, 2020 So I’m re doing my brakes on my eager beaver trailer 1994 . I bought new s-cams with bushing kits . My question is when installing the s-cam it is extremely tight to get it through the new Composite bushing near the slack adjuster . The composite bushing has a greese fitting and two metal plates that you bolt on either side to hold it in place . I have the s cam installed but it’s seems to snug to the point that I can’t even turn it by hand .i can’t remember how it should be since I haven’t done this in a few years . Any help please Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/ Share on other sites More sharing options...
Rob Posted March 3, 2020 Share Posted March 3, 2020 All I have installed have been a slight to moderate drag as you rotate the camshaft. Can you mike the internal diameter of the bushing and the external diameter of the camshaft bearing surface? What axles and brake sizes do you have? Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-444291 Share on other sites More sharing options...
cfd511 Posted March 3, 2020 Author Share Posted March 3, 2020 I canT spin it without the use of a mallet . dana/spiced axles . Brake pads open on both sides . The problem seems to be the alignment bushing near the slack adjuster . The scam easily moves in the bushing on the spider plate . Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-444296 Share on other sites More sharing options...
Rob Posted March 3, 2020 Share Posted March 3, 2020 2 hours ago, cfd511 said: I canT spin it without the use of a mallet . dana/spiced axles . Brake pads open on both sides . The problem seems to be the alignment bushing near the slack adjuster . The scam easily moves in the bushing on the spider plate . This style with 16-1/2" brakes: Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-444308 Share on other sites More sharing options...
Rob Posted March 3, 2020 Share Posted March 3, 2020 (edited) Those are generic photos of Eaton axles. I would need to know the model of the axle to drill down to correct parts. However, the part referenced as E-2104 gets bent out of alignment easily with lowboy type trailers due to the nature of the usage they get. If that inner bushing is held cocked in it's bore and not parallel to the S cam shaft, it will bind when the retaining plates are cinched down. This sounds like your problem. Get the axle model number off the tag which is usually affixed to the axle tube and I can put up an accurate photo for parts. Edited March 3, 2020 by Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-444310 Share on other sites More sharing options...
Swishy Posted March 3, 2020 Share Posted March 3, 2020 think Rob haz nailed it slaken off the keeper plate th@ holds the plastic pineapple bush next to the slaky then belt it with u're F B Mallet to realign the camshaft and bush wen happy with the effort of turnin the cam shaft tight n up the keeper plate cya Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-444313 Share on other sites More sharing options...
Ladylogger Posted May 17, 2020 Share Posted May 17, 2020 (edited) ok yall please no rude comments im a lady thats been logging for 18 years now .i have a 76 white road boss 290 cummins ,im learning to work on my truck about a month ago hauling a load to sawmill and i lost all air pressure i down shifted got stopped finally.left truck over night came back next day started up air pressure built upmade it to mill unloaded same thing happened again borrowed air compressor shot air into tank got truck home.so far i have changed the air dryer, purge valve, air governor and it simply wont build air pass 60,checked all line with soapy water,can yall help me out on this . Edited May 17, 2020 by Ladylogger Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-451397 Share on other sites More sharing options...
alex g Posted May 17, 2020 Share Posted May 17, 2020 Welcome aboard I'm thinking if you have no air leaks it's possibly your compressor. Did you try adjusting the new air governor? Its possible it's set to low. Did your brakes not automatically engage when your air pressure dropped? Btw cool looking old White Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-451407 Share on other sites More sharing options...
davehummell Posted May 18, 2020 Share Posted May 18, 2020 I had an air compressor stop making air intermittingly was the valves in the compressor head sticking and not sealing i looked for repair parts but non was available so exchange unite was installed. Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-451449 Share on other sites More sharing options...
Ezrider Posted May 18, 2020 Share Posted May 18, 2020 sticky unloader valve can cause the compressor to not build air. Quote Link to comment https://www.bigmacktrucks.com/topic/61237-air-brake-question-need-help/#findComment-451456 Share on other sites More sharing options...
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